1.頭文件加上 #include <QTextCodec>
2.QString 獲取拖拽或file對話框信息
3.先轉爲std::string ,然後由string 轉爲QString
QTextCodec *code = QTextCodec::codecForName("GB2312");// fix Chinese name;
std::string std_filename = code->fromUnicode(QfileName).data();
QString fileName =QString::fromLocal8Bit(std_filename.c_str());
4.後續再調用